write_file: bad FD

I just had squid 1.NOVM.11 die on me with a "write_file: bad FD".
Uptime at that point: around 6 hours, at an average of 7000 requests
per hour.

Anyone seen this?

Other than this it runs just fine :-).

-- 
Sincerely,                                                          srb@cuci.nl
           Stephen R. van den Berg (AKA BuGless).
"Good moaning!"